Each plumbing fixture or waste inlet shall be separately trapped by a trap integral with the plumbing fixture, or by a waterseal trap placed as near to the fixture or waste inlet as possible.
- A combination fixture having only one trap, provided that no separate compartment of such fixture is deeper than any other compartment connected to the same trap, and the waste outlets of such compartments are not more than 30 inches apart.
- Kitchen sinks with two compartments of different levels and having a continuous waste and one trap. The
trap and waste line shall be 1-1/2 inches minimum.
- Kitchen sinks with three compartments, where one or more may be of different levels and having continuous waste and one trap. In accordance with Section P-506.1, the trap and waste line shall be 2 inches minimum.
- A set of three single compartment laundry trays which are connected to one trap, provided that the waste
outlets are no more than 30 inches apart, and the trap is centrally located.
- Dishwasher wastes which are discharged through a directional flow fitting located in the sink fixture trap or
in the garbage grinder, provided a fixture drain loop is installed on the dishwasher waste to the highest point
below the fixture rim and the distance on center between the waste outlets of the sink and the dishwasher
does not exceed 6 feet.
The use or installation of the following types of traps is prohibited:
All traps shall be set true with respect to their water levels and shall be protected from freezing and evaporation and other loss of seal.
An approved house trap shall be installed in each sanitary house drain and in each house storm drain located within the property line of the building they serve, and shall be located at the curb line or in the building just inside the foundation wall. There shall be an air inlet for fresh air entering the house drain just inside the water seal of the trap.